What is the population of Lviv?Where is Lviv located in Ukraine?When was Lviv founded?Is Lviv known for its well-preserved historic center?What are some popular tourist attractions in Lviv?Where can you find the famous Lviv Opera House?When is the best time to visit Lviv?Is it true that Lviv is known for its coffee culture?What languages are commonly spoken in Lviv?Are there any annual festivals or events held in Lviv?